Aeroplane.



F. BIBERSTEIN.

AEROPLANE APPLICATION FILED JAN. 8, 1912.

Patented Mar. 26, 1912.

A Jg.1.

Elmoemtoz affo'mu s when the UNITED STATES PATENT OFF'1C'E.'

rmxx nrpnns'rnm, or MILWAUKEE, wrsconsm maormm I To all whom it may concern:

Be it known that I, FRANK Bnmns'rnm, acitizen of the United States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and. useful Improvements in Aeroplanes, of which the following is a specification.

My invention relates to improvements in aeroplanes for flying machines, and the like.

The object of my improvement isto increase the speed of the forward movement and the lifting ca acity of an aero lane whereby a plane 0? a given area un er a given air pressure, whether such pressure be produced by a rapid forward movement of the same when propelled by a motor, or by natural currents of air when gliding, or

lanes are otherwise exposed to currents 0 air will be greatly increased, and whereby planes of much smaller' area may. be used for supporting a given welght.

My invention is further explained by reference to the accompanying drawings, in which- I Figure 1 is a perspective view of an aeroplane'from' its lower side. Fig. 2 is an enlarged detail view of a small portion of the plane shown in Fig. 1. Fig. 3 is a transverse section, drawn on line mm of Fig. 2. Fig. 4 is a side view of one of the numerous deflecting blades shown in Figs. 1 and 2; and Fig. 5 is a detail view'of an enlarged portion of the plane included within the dotted line as of Fig. 2..

Like parts are identified by the same reference numerals throughout the several views.

i re resents "the body of the plane, which is pre erably made smooth upon its upper side and is slightly curved, as indicated in Fig. 1, while the lower side of the plane 1 is provided with a plurality of series of curved blades 2. The several series of blades 2 are sub-divided by a plurality of division bars 3, which extend in a direct line from' the frontrto the rear of the plane, while the several blades 2 are arranged at an angle to the division bars 3 and are secured to the body 1 of the plane with glue, or in any other convenient manner. The wider upper ends 4 of said blades 2 are connected with the division bars 3, while the narrower ends of said bars 2 converge toward their lower or rear ends, meeting centrally between the division bars 3 on t e line 6. The several v Specification of Letters Patent. Patented Ma 26, 1912. Application filed January 8, 1912. Serial 110. 688,972.

spaces 7, 7., between the blades 2, are practlcally covered by two series of blades 8, 8.

The blades of each series 8, 8, converge downwardly and meet together on the line 9. The object of the blades 2 and the blades 8 is to multiply the surface area against whlch the moving air is caused to act, whereby the lifting power of a plane of a given area under a given air ressure, will, as stated, be greatly multiplied, and whereby the'area o the planes of a flyin machine of'a given lifting capacity may be greatly reduced.

While the planes shown and described are adapted more especially to be used with flymg machines, it is obvious that the same may, if desired, be used for increasing the motive power of wind-wheels, such power belng increased in proportion to the surface area exposed tothe action of a moving current of air.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent is- 1. In a device of the described class, the combination with a plane having a smooth upper surface, of a plurality of parallel bars extending from the front to the rear of its lower'surface, two series of blades located between each pair'of "said parallel bars, the blades of the respective seriesconverging rearwardly and terminating on a central line between said parallel bars, and means for securing said blades and bars to the lower surface of said plane.

2. In a device of the described class, the combination with a concavo-convex aeroplane having a smooth upper surface, of a plurality ofparallel barsextending from the front to the rear of its lower concave surface, two series of blades located between each pair of said parallel bars, the blades of the respective series converging rearwardly and terminating on a' central line betweenrearwardly and terminating on a central said parallel bars, and means for securing line between said parallel bars, the front aeroplane, all substantially as and for the 10 ends of said blades being of a Width correpurpose specified.

spondin with the width of said parallel In testimony whereof I afiix my signature bars an convergingdupwardly towarg their in the presence of two witnesses.

rear or 0 osite en s, two series 0 rearwa'rdly cgl fverging smaller blades inter- FRANK B posed between each pair of said first named Witnesses: blades, and means for securing all of said JAs. B. ERWIN, blades and bars to the lower surface of said IRMA BREMER. 

